Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/IsTypeNode.java @ 5443:141817e206d4
changes to the dependencies and stamp system:
* dependencies can only be of type ValueNode
* exactType is a boolean flag, not a separate RiResolvedType
* use different Stamp subclasses for IntegerStamp, FloatStamp, ObjectStamp and GenericStamp
* use different stamp for nodes that can be a target for dependencies
* use different PhiNode constructors for value- and non-value-Phis
* use correct stamps for ExceptionObjectNode and CurrentThread
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Fri, 25 May 2012 11:35:18 +0200 |
parents | 0364a2a874b8 |
children | d89b20486d87 |
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/* * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.nodes.java; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; import com.oracle.max.cri.ci.*; import com.oracle.max.cri.ri.*; import com.oracle.max.cri.ri.RiType.Representation; public final class IsTypeNode extends BooleanNode implements Canonicalizable, LIRLowerable { @Input private ValueNode objectClass; private final RiResolvedType type; public ValueNode objectClass() { return objectClass; } /** * Constructs a new IsTypeNode. * * @param object the instruction producing the object to check against the given type * @param type the type for this check */ public IsTypeNode(ValueNode objectClass, RiResolvedType type) { super(StampFactory.condition()); assert objectClass == null || objectClass.kind() == CiKind.Object; this.type = type; this.objectClass = objectClass; } public RiResolvedType type() { return type; } @Override public void generate(LIRGeneratorTool gen) { // nothing to do } @Override public ValueNode canonical(CanonicalizerTool tool) { if (objectClass().isConstant()) { CiConstant constant = objectClass().asConstant(); CiConstant typeHub = type.getEncoding(Representation.ObjectHub); assert constant.kind == typeHub.kind; return ConstantNode.forBoolean(constant.equivalent(typeHub), graph()); } // TODO(ls) since a ReadHubNode with an exactType should canonicalize itself to a constant this should actually never happen, maybe turn into an assertion? if (objectClass() instanceof ReadHubNode) { ObjectStamp stamp = ((ReadHubNode) objectClass()).object().objectStamp(); if (stamp.isExactType()) { return ConstantNode.forBoolean(stamp.type() == type(), graph()); } } return this; } }